Question

When writing the electron configuration for Boron (5 electrons) we start filling first the first energy level (the 1s) before
the second energy level (before the 2s). Name the rule that says this is so and EXPLAIN THAT RULE IN YOUR OWN
WORDS.

Answer 1

Answer:

Thus, the first level can contain up to 2 electrons, 2(12) = 2; the second up to 8 electrons, 2(22) = 8; the third up to 18, 2(32) = 18; and so on

Explanation: